30 Best C# Project Ideas for 2026: Beginner to Advanced (with Current Stack)

Last updated April 2026 — refreshed for current .NET 10, C# 14, Unity 6, ML.NET 5, and ASP.NET Core 10 versions.

C# remains one of the most employable programming languages in 2026: it powers everything from Unity 6 game studios to enterprise ASP.NET Core 10 APIs, cross-platform .NET MAUI apps, and AI agents built with Semantic Kernel. This guide gives you 30 concrete project ideas — stratified by real skill level — with the exact technologies, current version numbers, and portfolio tips that hiring managers actually look for.

Each project is tagged with the core concepts it reinforces, the 2026-current stack to use, and a rough time estimate. Follow the difficulty order or jump straight to the tier that fits where you are today.

What changed in 2026 — read this before you start.NET 10 LTS + C# 14 shipped November 2025. Target net10.0 for any new project. C# 14 adds extension members, null-conditional assignment, field-backed properties, and first-class Span<T> conversions. Use dotnet --version to confirm you have the .NET 10 SDK.Unity 6 (LTS) is the current game engine release. Previous project tutorials referencing "Unity 2022 LTS" or "Unity 2023" are outdated. Unity 6.0 LTS is supported until October 2026, with the CoreCLR runtime migration underway in 6.7+.ML.NET 5.0 (stable) / 6.0-preview1 is the current ML framework. ML.NET 3.x tutorials are stale — version 5 adds Phi-4 model support, SentencePiece tokenizers, and Intel OneDal acceleration. The 6.0 preview (March 2025) adds GPT-model integration.ASP.NET Core 10 replaces MVC-first tutorials. New web projects should use Minimal APIs or Blazor with aspnetcore-10.0. Blazor's core JS bundle shrank 76% (183 KB → 43 KB), WebAuthn passkeys are built in, and the [PersistentState] attribute eliminates double-render boilerplate.X (Twitter) API free tier is gone. As of February 2026, X replaced its free tier with a pay-per-use model ($0.01 per post created). "Twitter Bot" tutorials that assumed free API access will not work for new developers without payment. Use a Mastodon or Bluesky bot instead, or budget for the X API cost.Semantic Kernel 1.75 is the .NET AI orchestration standard. For any AI-powered project, use Microsoft's open-source Microsoft.SemanticKernel NuGet package instead of raw HTTP calls to OpenAI.

TL;DR — Quick Skill-to-Project Map

Beginner-Level C# Projects

These projects target developers who know basic C# syntax — variables, loops, conditionals, and classes — but have not yet built a complete application. Each one can be finished in under a week and produces a working artifact for your GitHub portfolio.

1. To-Do List Manager

A task management app that lets users add, complete, and delete tasks with persistence between sessions.

• Stack (2026): C# 14, .NET 10, either WinForms (Windows-only, fastest to get running) or a console app with a JSON file store.
• Concepts reinforced: CRUD operations, List<T>, file I/O with System.Text.Json, event-driven programming.
• Portfolio tip: Add a due-date field and color-code overdue tasks. Recruiters notice details that go beyond the tutorial.
• Time estimate: 1–3 days.

2. Number Guessing Game

The player guesses a random number within a configurable range; the program gives higher/lower hints and tracks scores across rounds.

• Stack: C# 14 console app, Random.Shared (thread-safe singleton introduced in .NET 6, still the idiom in .NET 10).
• Concepts reinforced: while loops, exception handling, basic input validation.
• Extension: Add a leaderboard stored in a local SQLite file using Microsoft.Data.Sqlite.
• Time estimate: 4–8 hours.

3. Note-Taking Application

A minimal app for writing, editing, tagging, and searching text notes — a staple beginner project that teaches persistence and search logic.

• Stack: C# 14, WPF (Windows) or .NET MAUI (cross-platform), SQLite via EF Core 10.
• Concepts reinforced: MVVM pattern basics, database interaction, async/await.
• 2026 upgrade: Use EF Core 10's new ExecuteUpdateAsync batch API instead of loading entities for every edit.
• Time estimate: 2–4 days.

4. Tic-Tac-Toe Game

Classic two-player board game on a 3×3 grid with win-detection logic.

• Stack: C# 14 console or WinForms.
• Concepts reinforced: 2D arrays, game loop, logical win conditions.
• Extension: Add a Minimax-based AI opponent for a taste of game-tree search — this bridges naturally into the Chess AI project at the advanced level.
• Time estimate: 1–2 days.

5. Library Management System

A book inventory system where users can add, search, borrow, and return items, with a record of who holds each book.

• Stack: C# 14, EF Core 10 with SQLite, console or WinForms UI.
• Concepts reinforced: Object-oriented design, one-to-many relationships in EF Core, LINQ queries.
• Time estimate: 2–4 days.

6. Digital Clock with Stopwatch

A real-time clock display that also functions as a stopwatch and countdown timer.

• Stack: C# 14, WPF or .NET MAUI, System.Timers.Timer.
• Concepts reinforced: Timer callbacks, thread-safe UI updates with Dispatcher.Invoke (WPF) or MainThread.InvokeOnMainThreadAsync (MAUI).
• Time estimate: 1–2 days.

7. Contact / Telephone Directory

A structured address book for storing and searching contact details by name, phone, or email.

• Stack: C# 14, EF Core 10, SQLite, Blazor WebAssembly (for a web-accessible portfolio piece) or console.
• Concepts reinforced: LINQ, entity relationships, search with EF.Functions.Like.
• Time estimate: 2–3 days.

8. Basic Calculator

A four-function GUI calculator with history and keyboard input support.

• Stack: C# 14, WinForms or WPF.
• Concepts reinforced: Event-driven programming, string parsing, operator precedence handling.
• Extension: Add a scientific mode with trigonometric functions using System.Math.
• Time estimate: 1–2 days.

9. Weather Forecast App

Fetches current weather and a 5-day forecast from a REST API and displays it in a clean UI.

• Stack: C# 14, HttpClient, System.Text.Json, OpenWeatherMap API (free tier), .NET MAUI or Blazor.
• API note: OpenWeatherMap free tier is still active in 2026 — requires a key from openweathermap.org. Register at openweathermap.org/api.
• Concepts reinforced: REST API consumption, JSON deserialization with source generators, asynchronous HTTP requests.
• Time estimate: 2–3 days.

10. Simple Quiz Application

A multiple-choice quiz engine that loads questions from a JSON file, times each question, and scores the player at the end.

• Stack: C# 14, System.Text.Json, Blazor or console.
• Concepts reinforced: Serialization/deserialization, state machines, timer logic.
• Time estimate: 2–3 days.

Intermediate-Level C# Projects

These projects assume you are comfortable with OOP, async programming, and have built at least one beginner project. Expect to spend one to two weeks on each. The emphasis shifts to real-world concerns: database design, networking, authentication, and clean architecture.

11. Real-Time Chat Application

A peer-to-peer or group messaging system with live message delivery and user presence indicators.

• Stack: ASP.NET Core 10 (Minimal API backend), SignalR, Blazor Server frontend, EF Core 10 + PostgreSQL for message persistence.
• Concepts reinforced: WebSocket-based real-time communication, hub patterns in SignalR, database migrations.
• 2026 note: ASP.NET Core 10 ships with improved authentication metrics and WebAuthn passkey support out of the box — wire up passkey login for extra polish.
• Time estimate: 1–2 weeks.

12. Music Player

A desktop media player supporting local audio files, playlists, and playback controls.

• Stack: C# 14, WPF or .NET MAUI, NAudio 2.x NuGet library for audio decoding.
• Concepts reinforced: Background threads for audio playback, MVVM with data binding, file system watcher.
• Time estimate: 1–2 weeks.

13. 2D Car Racing Game

A top-down or side-scrolling racer with obstacles, lap timers, and increasing difficulty.

• Stack: Unity 6 (LTS, released 2024, supported until October 2026), C# scripting with the Entity Component System (ECS becomes a core package in Unity 6.4).
• Concepts reinforced: Rigidbody physics, coroutines, scene management, Unity Input System (the legacy Input class is deprecated in Unity 6).
• 2026 note: Unity 6 migrates from Mono/.NET to CoreCLR in Unity 6.7+ — build against the latest LTS for performance gains without losing stability.
• Time estimate: 1–3 weeks depending on art assets.

14. E-Commerce Web Application

A product catalog with cart, checkout, and order-history features — the classic intermediate web project.

• Stack: ASP.NET Core 10 Minimal APIs (backend), Blazor WebAssembly (frontend), EF Core 10 + SQL Server or PostgreSQL, Stripe API for payments.
• Do not use ASP.NET MVC: ASP.NET Core MVC still works but Minimal APIs with Blazor is the modern pattern as of 2025–2026. Tutorials using the old MVC template are showing their age.
• Concepts reinforced: CQRS with MediatR, JWT authentication, multi-tier architecture.
• Time estimate: 2–3 weeks.

15. Inventory Management System

Stock-level tracking with supplier records, low-stock alerts, and purchase-order generation.

• Stack: ASP.NET Core 10, EF Core 10, PostgreSQL, React or Blazor frontend.
• Concepts reinforced: Transactional updates, optimistic concurrency with EF Core, background jobs with IHostedService.
• Time estimate: 2–3 weeks.

16. Drawing / Paint Application

A vector-ish canvas where users draw shapes, lines, and freehand paths with undo/redo.

• Stack: C# 14, WPF with DrawingVisual or .NET MAUI Graphics API.
• Concepts reinforced: 2D rendering, command pattern for undo/redo, mouse event handling.
• Time estimate: 1–2 weeks.

17. Online Examination System

A web app for instructors to create timed tests and for students to take them, with auto-grading.

• Stack: Blazor Server (ASP.NET Core 10), EF Core 10 + SQL Server, ASP.NET Core Identity for role-based access.
• Concepts reinforced: Role-based authorization (student vs. instructor), session management, database-driven dynamic forms.
• Time estimate: 2–3 weeks.

18. Personal Finance Tracker

An expense and income logger with category breakdowns, monthly budgets, and chart visualizations.

• Stack: Blazor WebAssembly (PWA mode for offline use), EF Core 10 + SQLite, LiveCharts2 for data visualization.
• Concepts reinforced: MVVM in Blazor, offline-first data storage, aggregation queries in LINQ.
• Time estimate: 1–2 weeks.

19. Hospital / Clinic Management System

Patient records, appointment scheduling, and billing in a multi-user system with distinct roles for doctors, nurses, and admin staff.

• Stack: ASP.NET Core 10, EF Core 10 + PostgreSQL, ASP.NET Core Identity.
• Concepts reinforced: Multi-tier architecture, role-based access control (RBAC), complex relational schemas.
• Time estimate: 3–4 weeks.

20. Advanced Weather Dashboard with Alerts

Goes beyond the beginner app — multi-city support, historical graphs, severe-weather push notifications.

• Stack: Blazor Server, OpenWeatherMap or Open-Meteo API (fully free), SignalR for real-time alerts, IHostedService background poller.
• Concepts reinforced: Background services, reactive UI patterns, webhook integration.
• Time estimate: 1–2 weeks.

Advanced-Level C# Projects

These projects push into production-grade territory: concurrent systems, AI integration, security-sensitive code, and architectural patterns that appear in real senior-developer job interviews. Budget two to six weeks each.

21. Full-Text Search Engine (Mini)

Index a local document corpus and serve ranked search results with relevance scoring.

• Stack: C# 14, .NET 10, Lucene.Net 4.8 (the .NET port of Apache Lucene) or a custom inverted-index implementation.
• Concepts reinforced: Inverted indexes, TF-IDF scoring, BFS/DFS graph traversal, tokenization.
• Extension: Swap the tokenizer for a Semantic Kernel embedding-based search to add semantic similarity.
• Time estimate: 2–3 weeks.

22. Snake Game with High-Score Server

Classic Snake with a global leaderboard backed by a REST API — teaches full-stack thinking inside a fun project.

• Stack: Unity 6 (game client), ASP.NET Core 10 Minimal API (leaderboard backend), PostgreSQL.
• Concepts reinforced: Game loop, collision detection, REST API design, Docker containerization of the backend.
• Time estimate: 2–3 weeks.

23. Secure Banking System

Account management, transfers, and transaction history with AES-256 encryption at rest and audit logging.

• Stack: ASP.NET Core 10, EF Core 10, System.Security.Cryptography, SQL Server with row-level encryption.
• Concepts reinforced: Cryptographic hashing (SHA-3 via .NET 10), ACID transactions, pessimistic/optimistic concurrency, audit trail design.
• Time estimate: 3–4 weeks.

24. Chess Game with AI Opponent

A fully legal chess engine with a computer opponent using Minimax + alpha-beta pruning.

• Stack: C# 14, .NET 10, Unity 6 (for 3D board rendering) or WPF/MAUI (2D).
• Concepts reinforced: Game-tree search (Minimax, alpha-beta), bitboard representation, recursion depth management.
• Portfolio impact: A working chess engine with a configurable search depth is one of the strongest algorithmic demonstrations in a C# portfolio.
• Time estimate: 3–5 weeks.

25. Social Media Scheduling Tool

Queue posts for multiple social platforms on a schedule, with analytics on engagement.

• Stack: ASP.NET Core 10, Quartz.NET (job scheduler), LinkedIn API (still accessible) or Mastodon API (fully free and open). Avoid the X/Twitter API unless you can absorb pay-per-use costs ($0.01 per post as of February 2026).
• Concepts reinforced: Cron-based job scheduling, OAuth 2.0, background processing with IHostedService.
• 2026 warning: The X API free tier no longer exists. The project as originally conceived (Twitter bot) requires payment or a different platform.
• Time estimate: 2–4 weeks.

26. Flappy Bird Clone with Procedural Levels

Recreates the Flappy Bird mechanic, then extends it with procedurally generated obstacle patterns that adapt to player skill.

• Stack: Unity 6 LTS, C# scripting, Unity's new Input System, Rigidbody2D physics.
• Concepts reinforced: Procedural generation, object pooling (critical for performance in Unity), scriptable objects.
• Time estimate: 1–3 weeks.

27. ML.NET Image Classifier with REST API

Train a convolutional model to classify images into custom categories, then serve predictions via an ASP.NET Core 10 endpoint.

• Stack: ML.NET 5.0 (Microsoft.ML NuGet), TensorFlow backend via Microsoft.ML.TensorFlow, ASP.NET Core 10 Minimal API.
• 2026 specifics: ML.NET 5.0 (released November 2024) adds Phi-4 model support, SentencePiece Unigram Tokenizers, and Intel OneDal hardware acceleration. If you want the GPU acceleration, install the OneDal-enabled build.
• Concepts reinforced: Transfer learning, model pipeline design in ML.NET, REST API wrapping a ML model.
• Time estimate: 2–3 weeks.

28. Sales / Revenue Analytics Dashboard

An executive dashboard aggregating sales data across time periods, products, and regions with drill-down charts.

• Stack: Blazor WebAssembly, ASP.NET Core 10 API, EF Core 10, LiveCharts2 or Radzen Blazor Charts, PostgreSQL.
• Concepts reinforced: OLAP-style queries, aggregation pipelines, date-range filtering, CQRS with read models.
• Time estimate: 2–4 weeks.

29. Secure Online Voting System

An election platform with voter authentication, encrypted ballot submission, tamper-evident audit log, and result tallying.

• Stack: ASP.NET Core 10, ASP.NET Core Identity + WebAuthn passkeys (built-in to .NET 10), System.Security.Cryptography for SHA-3 hashing, EF Core 10 + SQL Server.
• Concepts reinforced: Cryptographic audit trails, zero-knowledge proof concepts (for extension), passkey authentication, double-spend prevention.
• Time estimate: 3–5 weeks.

30. AI-Powered Document Analyzer with Semantic Kernel

Upload PDFs or text documents, ask natural-language questions, and receive accurate answers grounded in the document content — a RAG (Retrieval-Augmented Generation) pipeline in C#.

• Stack: Microsoft.SemanticKernel 1.75.0, ASP.NET Core 10, Blazor frontend, a vector store (Qdrant or Azure AI Search), Azure OpenAI or a local Ollama model (free, runs offline).
• Local AI angle: For a fully offline variant, pair Semantic Kernel with a locally-running Ollama model — see the OpenClaw + Ollama setup guide for running local AI agents for a step-by-step configuration that works with C# projects.
• Concepts reinforced: RAG architecture, vector embeddings, chunking strategies, prompt engineering, async streaming responses.
• 2026 note: Semantic Kernel sits above Microsoft.Extensions.AI and below the Microsoft Agent Framework in the .NET AI stack — it is the right abstraction for most .NET AI integration scenarios today.
• Portfolio impact: AI-powered projects with a local-first architecture are the highest-signal portfolio pieces in the 2026 C# job market.
• Time estimate: 3–5 weeks.

How to Choose Your Starting Project

Use this decision tree:

1. Have you written fewer than 500 lines of C#? Start with projects 1–5. Build the To-Do Manager first — it's the fastest path from "hello world" to a real database-backed CRUD app.
2. Comfortable with OOP but never built a web app? Build project 9 (Weather App) to learn HttpClient and JSON, then go to project 11 (Chat App) for your first ASP.NET Core + SignalR experience.
3. Targeting game development roles? Start with project 4 (Tic-Tac-Toe with Minimax) in a console app, then move to project 13 (Car Racing) in Unity 6, then 26 (Flappy Bird clone), and finally 24 (Chess AI).
4. Targeting backend/API roles? Build projects 14 → 15 → 23 in order. Add Docker and GitHub Actions CI/CD to each one.
5. Targeting AI/ML roles? Build project 27 (ML.NET Classifier) first to understand the ML.NET pipeline, then 30 (Semantic Kernel RAG) for the modern LLM-integration pattern.

If you are actively hiring or scaling a C# team, Codersera's vetted remote .NET developers can accelerate your project with engineers who already know the 2026 stack.

Common Pitfalls and How to Avoid Them

• Targeting the wrong .NET version. Many tutorials still scaffold projects on .NET 6 or 8. Always check the TFM (<TargetFramework>net10.0</TargetFramework>) in your .csproj before starting.
• Using deprecated Unity APIs. Unity 6 removed the legacy Input class as the default — use Unity's new Input System package. Check Unity's Unity 6 migration guide before porting old tutorials.
• Blocking the UI thread. Every database call and HTTP request must use async/await. Using .Result or .Wait() on async methods in a WPF or Blazor app causes deadlocks.
• Hardcoding API keys. Store secrets in dotnet user-secrets (dev) and environment variables or Azure Key Vault (production). Never commit a key to GitHub — secret scanners will find it and it will be revoked within minutes.
• Skipping tests. Add at least a handful of xUnit or NUnit unit tests to every project. Employers specifically check for this in 2026 code reviews.
• Building without Docker. Containerize your ASP.NET Core app with dotnet publish --os linux --arch x64 /t:PublishContainer (available in .NET 10 SDK). It takes 10 minutes and dramatically increases perceived portfolio quality.

What Was Removed and Why

• Twitter Bot project (raw Twitter API): The X API free tier was eliminated in February 2026. Building an X bot now requires a paid pay-per-use account ($0.01/post). The project idea remains valid — replace Twitter with Mastodon (ActivityPub API, fully free) or Bluesky (AT Protocol, free developer access). Project 25 above covers this with Mastodon/LinkedIn instead.
• ASP.NET MVC-first web projects: Still functional, but new projects should use Minimal APIs + Blazor. MVC is in maintenance mode for new development. Project 14 above uses the modern pattern.
• Unity 2022/2023 LTS references: Superseded by Unity 6 LTS. All game projects above reference Unity 6.

Benchmark Reference — 2026 .NET Performance Numbers

The numbers below come from Microsoft's official .NET 10 release blog and the TechEmpower Framework Benchmarks (Round 23, Q4 2025):

Verify current numbers at the official .NET blog: devblogs.microsoft.com/dotnet/announcing-dotnet-10/

FAQ

Which C# version should I use in 2026?

C# 14, which ships with .NET 10 (released November 2025). Install the .NET 10 SDK from dotnet.microsoft.com and your new projects will default to C# 14 automatically. Run dotnet --version to confirm.

Should I use WinForms, WPF, or .NET MAUI for desktop apps?

WinForms is the fastest way to get a GUI running (Windows-only). WPF gives you a richer XAML-based UI (also Windows-only). .NET MAUI runs on Windows, macOS, iOS, and Android from a single codebase — it is the right choice if you want cross-platform reach. For web, Blazor WebAssembly or Blazor Server is the modern .NET approach.

Is Unity still C#? Which version should I target?

Yes — Unity scripting is C#. Target Unity 6 LTS (the latest stable family as of April 2026, supported until at least October 2026). Unity is gradually migrating from Mono/.NET to CoreCLR for better performance and full modern-C# compatibility; Unity 6.7+ includes an experimental CoreCLR desktop player.

What replaced the Twitter API for bot projects?

Mastodon and Bluesky both offer free developer API access with no posting fees. The Mastodon REST API is documented at docs.joinmastodon.org/api/. If you specifically need X/Twitter, budget for X's pay-per-use pricing ($0.01 per post created as of February 2026).

How do I add AI to a C# project in 2026?

The standard .NET AI stack is: Microsoft.Extensions.AI (provider-agnostic abstractions) → Microsoft.SemanticKernel 1.75 (orchestration, plugins, memory) → provider SDK (Azure OpenAI, Ollama, etc.). For a local, free, offline setup, see the OpenClaw + Ollama guide for local AI agents.

Do these projects need to be deployed to count for portfolio purposes?

Deployed projects are significantly more impressive. For web apps, deploy to Azure App Service (free tier available) or containerize with Docker and run on a VPS. For Unity games, publish to itch.io (free). At minimum, make the GitHub repo public with a clear README, screenshots, and a docker-compose.yml if applicable.

Is ML.NET still relevant now that LLMs exist?

Yes — ML.NET 5.0 handles structured-data problems (classification, regression, anomaly detection) where you own the training data and want an in-process model with no API latency or per-token cost. It is not a substitute for LLMs for open-ended language tasks. Use ML.NET for tabular data, image classification on edge devices, and sentiment analysis on domain-specific corpora. Use Semantic Kernel for anything requiring natural-language generation or reasoning.

What testing frameworks should I use?

xUnit is the dominant choice in the .NET ecosystem in 2026. NUnit is still widely used in enterprise codebases. MSTest is fine but less common for new projects. For mocking, use Moq 4.20+ or NSubstitute. Add integration tests with Microsoft.AspNetCore.Mvc.Testing for any ASP.NET Core project.

References & Further Reading

• Announcing .NET 10 — Official Microsoft .NET Blog
• What's New in C# 14 — Microsoft Learn
• ML.NET Releases — GitHub dotnet/machinelearning
• Unity 6 Release Page — Unity Technologies
• What's New in ASP.NET Core 10 — Microsoft Learn
• Microsoft.SemanticKernel on NuGet (v1.75.0)
• TechEmpower Framework Benchmarks — Round 23
• X (Twitter) API Pricing 2026: All Tiers Explained — PostProxy